Oil agent for carbon fiber precursor fiber, carbon fiber and method for producing carbon fiber

A technology of carbon fiber precursors and fibers, which is applied in the fields of fiber chemical characteristics, synthetic polymer artificial filament chemical post-treatment, textiles and papermaking, etc. It can solve problems such as hindering oxygen, hindering productivity, yarn breakage or fluffing, etc., and achieve heat suppression Adhesion and adhesion inhibition effect

Inactive Publication Date: 2007-12-19
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silicone oil agent used here intervenes between single fibers in the flame-resistant process, preventing the supply of oxygen necessary for the flame-resistant reaction, resulting in uneven progress of the flame-resistant reaction (so-called uneven firing).
Moreover, it is easy to cause problems such as yarn breakage and fluffing in the subsequent carbonization process, which often hinders the improvement of productivity.
In response to this problem, a technique for improving the curing properties of a specific silicone oil agent has been disclosed (for example, Patent Document 2), but the extent to which carbon fibers can be further enhanced in performance is limited.

Method used

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  • Oil agent for carbon fiber precursor fiber, carbon fiber and method for producing carbon fiber
  • Oil agent for carbon fiber precursor fiber, carbon fiber and method for producing carbon fiber
  • Oil agent for carbon fiber precursor fiber, carbon fiber and method for producing carbon fiber

Examples

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preparation example Construction

[0028] Examples of the preparation method of the liquid fine particles used in the oil agent of this embodiment include a method of emulsifying a liquid with a high kinematic viscosity such as the above-mentioned silicone oil with a dispersant, a method of obtaining liquid fine particles by emulsion polymerization of silicone oil, and the like. An organic solvent may be used as the dispersant, but water is preferably used from the viewpoint of imparting uniformity to the precursor fibers and ease of imparting.

[0029] When using water as a dispersant, it is preferable to use a surfactant in combination. The type of surfactant is not particularly limited, and any of anionic, cationic, nonionic, and amphoteric surfactants can be used. In addition to combinations of anionic surfactants and cationic surfactants, the above-mentioned substances can also be used in combination. Among them, cationic surfactants are preferable, weak cationic surfactants containing amino groups and th...

Embodiment 1

[0124] Prepare the carbon fiber precursor oil of the following formulation.

[0125] Amino-modified silicon 66 parts by weight

[0126] Alicyclic epoxy modified silicon 28 parts by weight

[0127] 5 parts by weight of alkylene oxide modified silicon

[0128] 30 parts by weight of nonionic surfactant

[0129] Water 4000 parts by weight

[0130] As the amino-modified silicon, a silicon compound obtained by substituting a part of the side chain of dimethyl silicon with an amino group represented by the following chemical formula 1 was used. The amino equivalent of amino-modified silicon is 2000 mol / g, and the kinematic viscosity at 25° C. is 1000 cSt. As the alicyclic epoxy-modified silicon, a silicon compound obtained by substituting a part of the side chain of dimethyl silicon with an alicyclic epoxy group represented by the following chemical formula 2 was used. The epoxy equivalent of alicyclic epoxy-modified silicon is 6000 mol / g, and the kinematic viscosity at 25° C. i...

Embodiment 2

[0138] Carbon fibers were obtained in the same manner as in Example 1 except that the oil of the following formulation was used instead of the oil for carbon fiber precursors used in Example 1.

[0139] 100 parts by weight of amino-modified silicon

[0140] 30 parts by weight of nonionic surfactant

[0141] Water 4000 parts by weight

[0142] As the amino-modified silicon, a silicon compound obtained by substituting a part of the side chain of dimethyl silicon with an amino group represented by the following chemical formula 1 was used. The amino equivalent of the amino-modified silicon is 2000mol / g, and the kinematic viscosity at 25°C is 3500cSt. Add the above-mentioned silicon, surfactant and water, and use a homomixer and a homogenizer to prepare an emulsion. KM902 (manufactured by Shin-Etsu Chemical Co., Ltd.) was added to the emulsion and stirred to obtain an oil preparation.

[0143] During the production of the carbon fibers, significant fuzzing and cutting which wo...

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Abstract

By using an oil agent for precursor fiber of carbon fiber containing a base compound and a liquid fine particle, and said liquid fine particle contains a liquid of which kinematic viscosity at 150 DEG C is 15000 cSt or more, it is possible to suppress an uneven stabilization in stabilizing process, and it becomes possible to provide a carbon fiber of high performance and uniform quality.

Description

technical field [0001] The present invention relates to carbon fibers having a small single-fiber elastic modulus distribution, a carbon fiber production method capable of producing the carbon fibers with high operability, and an oil agent for carbon fiber precursor fibers used in the production method. Background technique [0002] Compared with other fibers, carbon fiber has higher specific strength and specific elastic modulus. Therefore, as a reinforcing fiber for composite materials, it is not only used in sports, aviation and space, but also in automobiles, civil engineering, construction, pressure vessels, Widely used in general industrial applications such as windmill blades. Especially in sports and aerospace applications, there is an increasing demand for higher strength and higher elastic modulus of carbon fibers. Furthermore, while the above-mentioned high performance is required, it is also required to improve the material allowable value by improving the relia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F11/06D01F6/18D01F9/22
Inventor 田中文彦山本泰正
Owner TORAY IND INC
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